Hydrometer.



J. 6I G. BERG. HYDROMETER. APPLICATION FILED IuLY 3|. 1915.

Patented Apr. 18, 1916.

JAMES BERG- AlTlD GUSTAV BERG, F BROOKLYN, NEW YORK.

HYDROMETER.

Specification of Letters Patent.

Patented Apr. 18, 1916.

Application led .Tuly 31, 1915. Serial N o. 42,910.

To all whom t may concer/n.:

`Be it known that we, JAMES BERG and GUsTAv BERG, citizens of the UnitedStates,

and residents of Brooklyn, in the county of 5 Kings and State of NewYork, have invented certain new and useful Improvements in Hyd'rometers,of which the follow` in is a specification.

his invention relates to hydrometers and more especially to syringes inwhich the hydrometers are contained and operated, and -the object 'ofthe invention is to provide a transparenttube with a bulb at the pointWhere the scale of the hydrometer is read and havingr a flexible bulb atthe upper end and a. {iexible nozzle at'its lowerend, with vvariousotherdetails of construction, whose objects will be more fully describedin the following specification, set forth in the claimsaricf'illustrated in the accompanying drawings',""wherein:

Figure is a side elevation of the device, Fig. 2. is a verticalsectional View of the same. Fig. 8. vis a plan view of the tube with theflexible bulb removed. Fig. 4. is a view of thetube with the otherpartsde# tached. Fig. 5. is a plan view of the nozzle.

The presentinvention is designed to overcome serious objections inhydrometer syringes as heretofore made, and where the instrument is readwith diiliculty and the latter was liable to be carried up within theflexible bulb used tofill thetube of the syringe, or to close the outletof the nozzle when the saidbulb was compressed to expel the air.

' In order to A:provide freedom of movement for the hydrometer so .thatit can be read,'

the tube 10 of the syringe is enlarged into a 40 bulb 11 near its upperend, or atthe point Where it is generally read, in order that theinstrument Vmay float freely and not hug one side of Athe tube,rendering accurate reading diiicult. With the scale of the hydrometerextending .into the bulb while its enlarged lower end is located in thetube, the

scale is read with more ease as it can be relied upon to' occupy acentral point equidistant fromthe sides of the bulb where it tu will notbe distorted by the convexity of the said bulb. The upper end of thetube is provided With a Harige 12 on which is tted the flexible-bulb 13and yof such size that when the air is expelled from the tube asutlicient amount of liquid returns to fill the empty tube to a pointwhere the hydrometer may be conveniently floated. Within this end of thetube is located a perforated washer' 14 which permits the air to freelypass into and out of the flexible bulb. but prevents the hydrometer frompassing out of the tube and into the bulb. The lower end of the tube 10is reduced as at 15 and into this end is fitted the head 16 of thenozzle 17. This nozzle is hollow throughout its length and the inner endof the head is tapered and provided with ribs 18, so that when theweighted bulb 190i the hydrometer descends as the liquid is eX- pelled,it will rest on the ribs and `not close the outlet of the nozzle. Theribs will sup- 7G port the bulb 19 at such a distance as to let theliquid pass out. The construction above described provides a simpleandcheap device for accomplishing the results desired and 'the nozzle, tubeand 75 `lexiblebulb are readily assembled or sepa- 'l ratedfor repairsor shipping. Any oneof the parts if lost or injured may be replaced at asmall cost. Q

It is obvious that the parts may be modified or altered withoutdepartingr from the essential features above described nor from thescope of the appended claims.

What we claim as new, is.:

1. In hydrometers, the combination with a transparent tube-having a bulbnear one end, of a filling bulb at one end. a 4flexible nozzle at theother end with a ribbed head fitting into the tube and a hydrometerwithin the tube.A

2. In h vdrometers, the combination with a transparent tube, of ahvdrometer within the same, a bulb in the tube substantially at a pointvwhere the scale of the h vdrometer is to be read and adapted tofacilitate the reading of the scale. -a fiexible nozzle at the lower endof the tube and having a ribbed upper end. a washer at the upper end ofthe tube, and a filling bulb at the saine end of the tube.

'Signed at Brooklyn in the county of Kings and State ot' New York thisQGday of March A. D. 1915.

J AMES BERG. (JrlhTAY BERG.

fitness Funnnmc'ii V. Spanne.

